Toyota 2RZ-FE

The Toyota 2RZ-FE is a 2.4 L (2,438 cc, 148.8 cu·in) straight-four 4-stroke natural aspirated gasoline engine from Toyota RZ-family. The 2RZ-FE engine was manufactured from 1994 to 2004.

The 2RZ-FE engine features a cast-iron cylinder block and aluminum cylinder head with two overhead camshafts (DOHC) and four valves per cylinder (16 in total). The Toyota 2RZ-FE engine used Multipoint fuel injection system and Electronic Spark Advance (ESA) ignition system.

Compression ratio rating is 9:5:1. The cylinder bore is 95.0 mm (3.74 in) and the piston stroke is 86.0 mm (3.39 in). The 2RZ-FE engine produced 144 PS (106 kW; 142 HP) at 5,000 rpm of maximum horsepower and 217 N·m (22 kg·m, 159.9 ft·lb) at 4,000 rpm of maximum torque.

The breakdown of the engine code is as follows:

• 2 – 2-nd generation engine
• RZ – Engine family
• F – Economy narrow-angle DOHC
• E – Multi-Point Fuel Injection

General information

Cylinder block

The 2RZ-FE has a cast-iron cylinder block. A 95.0 mm (3.74 in) cylinder bore and 86.0 mm (3.39 in) piston stroke give the 2RZ-FE engine a total of 2,438 cc, (148.8 cu·in) of displacement. Compression ratio rating is 9.5:1. The 2RZ-FE engine used a fully-balanced crankshaft with 60.00 mm (2.36 in) of main journal diameter and 53.000 mm (2.08 in) of crankpin journal diameter.

Crankshaft bearing cap tightening procedure and torque specs:

• Step 1: 39 Nm; 3.9 kg·m; 29 ft·lb
• Step 2: Turn all bolts 90°

After securing bearing cap bolts, make sure crankshaft turns smoothly by hand.

Connecting rod bearing bolts

• Step 1: 45 Nm 4.6 kg·m; 33 ft·lb)
• Step 2: Turn bolts 90°

Cylinder head

The cylinder head is made of aluminum alloy which gives it good cooling efficiency. The engine has dual overhead camshaft design with four valves per cylinder. The intake camshaft is driven by a timing chain which has a hydraulic chain tensioner and oil jet for lubrication. The exhaust camshaft is driven via a scissors gear from the intake camshaft.

This engine does not use hydraulic lifters, so you need to adjust the valves clearances every 30,000 km (20,000 miles) of mileage.

Head tightening procedure and torque specs:

• Step 1: 39 Nm; 4.0 kg·m; 29 ft·lb
• Step 2: Turn all bolts 90°
• Step 3: Turn all bolts another 90°

Maintenance data

Valve clearance adjustment data

Calculate the thickness of new adjusting valve shim so valve clearance comes within specified values.

R = Thickness of removed valve shim
N = Thickness of new valve shim
M = Measured valve clearance

Intake:
N = R + [M – 0.20 mm (0.008 in)]
Exhaust:
N = R + [M – 0.30 mm (0.012 in)]

Valve shims are available in 17 sizes to range from 2.500 mm (0.0984 in.) to 3.300 mm (0.1299 in.), in steps of 0.05 mm (0.0020 in).

Example (exhaust valve):
R = 2.650 mm
M = 0.500 mm
N = 2.650 + (0.50 – 0.30) = 2.800 mm.

Vehicle applications

Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.